Composite electric conductor



(No Model.)

C. A. MBZGER. COMPOSITE ELECTRIC CONDUCTOR. NO. 477,951. Patented June 28, 1892.

1 L`Ql- /N VENTOI? f A TTOH'NEYS NIH "gyn Illu UNITED STATES PATENT OFFICE.

CHARLES A. MEZGER, OF BROOKLYN, NEXV YORK.

COMPOSITE ELECTRIC CONDUCTOR.

SPECIFICATION forming part of Letters Patent N o. 477,951, dated June 28, 1892. Application filed October 30, 1891. Seria-l Nc. 410,322. (No model.)

To all whom t may concern/.-

Be it known that I, CHARLES A. MEZGER, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Composite Conductors for Electric Circuits, of which the following is a full, clear, and exact description.

My invention relates to conductors for the transmission of electricity when these are grouped to convey electric currents in paral` lel, and has for its object to provide means for the compact assemblage of two or more electric conductormediums and the com plete insulation of each from others.

A further object is to provide novel means for the branching of lateral conductors from main lines, producing angular deviations from straight lines of conductor mediums, or coupling together of two or more composite cond noter-sections and etfectually insulating each conductor from an adjacent conductor.

To these ends my invention consists in the peculiar construction and combination of parts, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure lis a partly sectional View of the improved composite conductor broken away at one end, showing` means for an insulation of three ccncentrically-assembled conductors and means to join said conductors to a novel couplingforan insulated connection of a similar conductor-section. Fig. 2 is an axial section of a composite coupling and a lateral branch thereon adapted to join two of the composite conductors shown in Fig. l in axial alignment and connect therewith a laterallyprojecting composite conductor of similar construction. Fig. 3 is an axial section of a composite conductor-coupling adapted to connect two sections of the joined conductors shown in Fig. l at right angles to each other and preserve their insulation. Fig. a is an axial section of a composite socket or sleeve coupling adapted to couple two sections of the composite conductor shown in Fig. l and align them, the opposite ends of the concentric sockets being tapped with oppcsitely-pitched threads; and Fig. 5 is an axial section of a socketcoupling similar in construction to that shown in Fig. 4, but threaded the same pitch at each end.

The composite conductor for electricity shown in Fig. l consists of wire strand or rod A, covered with any suitable non-conductor B, whereon a second electric conductor C of a tubular form is placed,the interposed non-conducting material being adapted to lill the space between completely and hold the tubular conductor concentric with the one first named. Upon the electric conductor C an insulating material D is secured to form an even coating between the tubular cond uctor mentioned and another external tubular conductor E, that is thus maintained concentric with the conductors A and C, which conductors may be made ot any convenient length.

To facilitate the connection of the conccntric electric conductors A C E with similar conductor-sections, and thus produce a ccmposite electric conductor of any desired length, the ends of these conductors are extended one beyond the other, as shown, the central rod or wire conductorA, projecting a suitable distance beyond the tubular conductor C, which latter is similarly projected beyond the exterior tubular conductor E, and all of these pieces are cut with screw-threads at each end of a composite conductor-section.

ln order to extend a line of three main couductors a required distance from a source of electric generation, if several composite conductor-sections are required to ettect this, the composite socket or sleeve-couplings shown in Figs. et and 5 are employed` which, asindicated, consist each ofl a set of three tubular pieces a b c, concentrieally arranged, with suitable non-conducting material d e interposed between these pieces, so as to insulate them from each other. At each end of the external piece a internal threads are formed, which are designed to enga-ge with the external threads of two similar exterior conductors E. The sleeve-piece b is also internally threaded and adapted to Iit upon the threaded end portions of two tubular conductors C of similar com posite conductorsect-ions, this piece being made proportionally shorter than the external piece a of the coupling to adapt it to simultaneously engage the threaded end portion of the conductor C when the threaded IOO be employed, and is reduced proportionately in length to suit the projecting ends of the rods named, so that two composite electric conductor-sections may be joined together` and the insulation of each individual conductor A C E be maintained at the points of junction. To insure such an insulation at the ends of the conductors which are joined, the insulations d and e between the socketpieces a b c are extended in advance of the socket ends, so as to ill up any space that may intervene when the parts are screwed together. ltwill be evident that if the composite socket shown in Fig. 4 is used and the ends of com?. posite conductor-sections that are to be joined are threaded right and left-handed to mate similar threads at opposite ends of the socketpieces forming this composite socket, the latter may be made to join two aligning sections of a composite conductor by simply entering the ends of the conductor-sections within opposite ends of the composite socket-coupling and rotating the latter in a proper direction, this form of a coupling being advantageous when two lines of conductors having considerable length are to be joined.

The socket-coupling shown in Fig. 5 being tapped for the connection of composite conductor-sections that are both cut with righthand threads may be employed to successively connect composite conductor-sections, and thereby form a composite conductor of any desired length, having its concentric conductors A C E perfectly insulated from each other.

Then it is desired to connect one or more branch composite conductors similar to that shown in Fig. l with a main line having an equal number of concentric electric conductors assembled in a like manner, the coupling shown in Fig. 2 is employed, which consists ot a set of T-pieces g h 1T concentrically assembled and held spaced apart by the similarly-formed insulators m and n, that are intermediately placed, so as to adapt each T- piece to have a threaded connection with the threaded ends of composite conductor-sections made like Fig. l, said insulations having their end portions projected beyond the ends of the concentric Ts to insure good insulation where the parts connect, each of the Ts g ht' being graded in length from the outer one inwardly, so as to permit a si multaneous connection therewith of the composite conductor-sections, as has already been explained with regard to the socket-couplings shown in Figs. 4 and 5.

In Fig. 3 there is a composite coupling shown for the insulated connection of two composite conductors at a right angle to each other, thisl coupling being composed of three Ls m n o, eoncentrically assembled and separated by intermediate insulations p r, the Ls being successively reduced in length and diameter to allow such an arrangement ot parts and also to permit the ends ot' composite conductor-sections to engage with each of the concentric Ls, the insulations between adjacent Ls projecting beyond the ends of the Ls for the purpose of perfecting the insulation between these pieces and the concentric conductors A C E, that may be screwed into them.

It will be evident that a greater number of electric conductors in tubular form may be assembled and insulated, as stated, and that the component parts of the couplings (shown in Figs. 2, 3, 4t, and 5) may be correspondingly increased within the scope of my invention, the essential features of which comprise concentrically-arranged tubular conductors, a central wire-rod conductor, and couplings of corresponding construction, the parts ot the composite conductor-sections and the couplings beingheld separated by intervening insulations.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentl. A composite electric conductor made up of sections, each section comprising two concentric conductor mediums that are tubular, a solid center conductor and intermediate insulatin g material that separates the conductors, and threaded connections for said sections, substantially as described.

2. Acomposite electric conductor composed of a series of concentric conductor mediums that are tubular, a solid center conductor that is cylindric, and annular insulations interposed between adjacent conductors that are graded for length at the ends, the longest being central and all the ends externally threaded to engage with a composite coupling, substantially as described.

3. A coupling for composite conductor-sections, composed of concentric tubular pieces that are graded in length and diameter and have annular insulating mediums intervening between adjacent coupling-pieces, substantially as described.

4. A coupling for composite conductor-sections, that iscomposed of T-pieces which are hollow and internally threaded at the ends, said pieces being graded for length and diameter and held concentric by interposed insulations that completely till spaces between the T-pieces, substantially as described.

CHAS. A. MEZGER.

Vitnesses:

E. M. CLARK, WM. P. PATToN.

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